transforms schools like investing in advanced teacher education. let's build a strong foundation. let's invest in our teachers so they can inspire our students. let's solve this. >>> welcome back. as you know, facebook's top executives have been staying out of spotlight since the company's ipo debacle earlier this year. chief operating officer sheryl sandberg just spoke exclusively to our own julia boorstin at the company's future. julia joins me with the highlights from the facebook headquarters in new york. julia, over to you. >> marimaria, sheryl sandberg s facebook has changed since its ipo, showing investors this is a company to bid on for the long haul, trying to find revenue from more different places on facebook. priority number one is building facebook's advertising revenue to turn around decelerating growth. >> already in the last couple months you've seen us roll out products pretty aggressively. we rolled out facebook exchange, custom audiences, new mobile ad formats, revamped our offers. all of these do one thing, which is they help make ads more targeted, more useful, an